wellman



-F. E. WELLMAN.

FURNACE FOR OIL CRACKING STILLS.

APPLICATION FILED JAN. 19. 1912.

1,328,468, Patented Jan. 20, 1920.

4 SHEETSSHEET I.

mnnfoz F. E. WELLMAN.

FURNACE FOR 01!. CRACKING STILLS.

APPLlCATION FILED JAN. 19, 1917.

1,328,46 Patented Jan. 20, 1920.

4 SHEETS-SHEET 2- F. E. WELLMAN.

FURNACE FOR OIL CRACKING STILLS.

APPLICATION FILED JAN. 19, 1917.

1,328,468, Patented Jan. 20, 1920.

4 SHEETS-SHEET 3.

Snow Mom as W F. E. WEL LMAN. FURNACE FOR 0H. CRACKING STILLS.

APPLICATION FILED JAN. 19, I917.

IIIIIIIII 4 SHEETSSHEET 4.

Patented Jan. 20, 1920.

$1M! E num wk alien W11 UNITED STATES PATENT OFFICE.

FRANK E. WELLMAN, OF KANSAS CITY, KANSAS, ASSIGNOE TO THE KANSAS CITY GASOLINE COMPANY, OF KANSAS CITY, KANSAS, A CORPORATION OF KANSAS.

FURNACE FOR OIL-CRACKING- STILLS.

Specification of Letters Patent.

Patented Jan. 20, 1920.

Application filed January 19, 1917. Serial No. 143,357.

To all whom it may concern:

Be it known that I, FRANK E. WELLMAN, a citizen of the United States, residing at Kansas City, in the county of Wyandotte, State of Kansas, have invented certain new and useful Improvements in Furnaces for Oil-Cracking Stills, of which the following is a specification, reference being had therein to the accompanying drawing.

My invention relates to furnaces and more particularly to furnaces for oil cracking stills or retorts.

An object of my invention is to provide a furnace of the above type in which the heat is distributed uniformly within the oven or heating chamber.

Another object of my invention is to provide means for conducting heated gases or other heat conveying means from one or more sources into the heating chamber at different points therein, and adapted to compensate for drop in temperature and draft pressure at the diiferent points of entrance into the heating chamber due to the diflerence in travel from the source.

A further object is to provide means for controlling the supply of hot gases to a given area independently of other areas and without interfering with the draft and ternperature compensation between different points in the area controlled.

Other objects of my invention will appear as the description proceeds, the invention residing in the construction, combination and arrangement of parts as hereinafter described and claimed.

While a preferred embodiment of my invention is herein illustrated and described for the purpose of disclosure, it is to be understood that various modifications may be made thereof, within the scope of the appended claims, without departing from the spirit of the invention.

My invention is illustrated in the accompanying drawings in which:

Figure 1 is a top plan view of my improved furnace.

Fig. 2 is a front elevation of the same.

Fig. 3 is a horizontal section on the line 3-3 of Fig. 2.

Fig. 4 is a longitudinal vertical section on the line %4- of Fig. 2 on a larger scale and with the combustion chamber omitted.

Fig. 5 is a vertical transverse section on the line 55 of Fig. 4.

' Referring to the drawings in detail, 1 is the oven or furnace proper which is supplied with heat from a plurality of sources such as the combustion chambers 2 and 3 from which the hot gases are conducted to the furnace through main ducts 4L and'5, and distributing ducts 6, 7 8, 9 and 10, 11, 12, 13, respectively. These combustion chambers are preferably adapted to the burning of oil, and to this end are each provided with an oil burner 14 to which oil and air are supplied in a well known manner through supply pipes 15 and 16.

Each of the main ducts 4; and 5 is provided with double metal walls packed with heat insulating material, such as asbestos, while the outside portion of each of the distributing ducts 6, 7, etc., between the main duct and the furnace wall, is covered with a sheathing of heat insulating material, as shown in the broken away portion at the left of Fig. 3.

The casing or inclosure of the furnace proper consists of the floor 17, front, back and side walls 18, 19, 20 and 21, respectively, and a double metal walled top 22 packed with asbestos or other suitable heat insulating material. This forms the main furnace chamber 23, and above this and centrally located thereof is the preheater chamber 2% formed by the double metal walls 25, also packed with suitable insulating material. The preheater chamber 24 communicates with the main chamber 23 through the opening 26 in the cover 22, thus forming an eX-- tension of the main chamber leading to the stack 27 which connects with the superheater chamber at the top thereof through the opening 28 in the top wall. A. damper 29 is provided in the stack, and is arranged to be operated from a distance by means of a suitable cord connection 30 and retractile spring 31 connected with the operating lever 32, the other end of the retractile spring being connected to some fixed point such as the stack itself, as shown in Figs. 1 and 2.

Mounted within the main furnace chamber 23 is the cracking coil 33 the'tubes of which are supported intermediate their length by I-beams 3% extending transversely of the furnace and supported in the side walls thereof, each tube having one end supported in and projecting through the front or back wall of the furnace and provided with a flanged and capped head 35 to facili- In the-upper or preheater chamber 24 is mounted the preheater coil 27, by means of the pipe supports 28' suspended from longi- 'tudinal I-beams 29 (see Figs. 4 and The I-beams 29 rest on transverse I-beams 37 supported at their ends at the tops of the vertical I' beam columns 38 which in turn are supported on the longitudinal I-beams 39. Theupper end of the coil 27 connects with a suitable inlet pipe 40 leading from a source ofpsupply of oil or other substance to be treated, the lower end of the coil 27' is connected by a pipe 41 to the upper end of the cracking coil 33, and the lower end of the cracking coil is connected to an outlet pipe 42 leading to a cooler or condenser and other i receiving apparatus.

Inorder to effectan even distribution of the hot gases from the combustion cham ybers into the furnace,,I make the combus- .will have the same distance to travel.

tion chambers and ducts leadingtherefrom similar inevery respect, that is, I not only make the combustion chambers of the same size but so place them, in relation to the furnace proper, that the hot gases from each In t pfurther pursuance of this object I arrange 2' the groups of distributing ducts to enter the main furnace chamber from opposite sides,

,and to extendacross the entire width of the tier of the cracking coil 33.

chamber with outlet openings 43 in the tops increasing in width in proportion to their distance. from the source of heat. In order toprevent short oircuiting of the draft between the two roups of distributing ducts I provide a ba e or break-wall 45 of firebrick extending the width of the chamber between the two groups of distributing ducts, and from the floor upwardly to the lower Dampers 46 are provided in all of the distributing ducts on the outside of the furnace, near their points of juncture with the main duct. The

stems 47 of the dampers are extended up- .wardly through the distributing ducts and bent over to form crank arms 48, which crank arms, associated with a given group of distributing ducts, are pivoted as at 49 to a common damper operating bar 50, which operating bar is arranged to be controlled 1 from a distance by means of a suitable pull fcord 51,and a retractile spring 52 connected ing of the main duct.

between one end of the bar and the fixed spring holder 53 mounted on the eas- It is sometimes desirable to vary the relative set of the dampers 46 so that compensation may be made for the difference in distance from the source, and for this I provide a plurality of holes such as 54 on each side of the normal pivot points 49 in the operating bar 50. It is obvious thatthis adjustment of the relative set of the dampers may be made by changing the position of the dampers'on their stems without changing the parallelism of the crank arms, the difference between the two methods of adjustment, of course,

. variation in temperature and draft pressure in the different distributing ducts due to the variation in their distance from the source may be compensated for by the relative adjustment of the dampers, and that the combined draft pressure may be regulated by adjustment of the damper in the stack.

Having thus described my invention, what I claim and desire to secure by Letters Patent is:

1. A furnace for cracking retorts comprising a heating chamber, a source of heat therefor, a plurality of ducts leading from said source to different points within said chamber, a damper for each of said ducts, operating means common to a plurality of said dampers and means for separately adjusting the position of each damper in relation to the common operating means.

2. A furnace for cracking retorts comprising a heating chamber, a source of heat therefor, a plurality of ducts leading from said source to different points within said chamber, a damper for each of said ducts, and operating means common to a plurality of said dampers.

3. A furnace for cracking retorts comprising a heating chamber, a source of heat therefor, a plurality of ducts leading from said source to different points within said chamber, a damper for each of said ducts, operating means common to a plurality of said dampers, said dampers being arranged to have different angular positions for a given position of said operating means.

4. A furnace forvcracking retorts comprising a heating chamber, a retort in said heating chamber, a source of heat, means for conveying heat from said source to different points of discharge within said heating chamber, said means arranged to compensate for difference in the degree of heat and draft pressure at said different points of discharge due to variation in distance from the source, means for controlling the draft through a given group of said points of discharge and a common operating means for a plurality of said group controlling means.

5. A furnace for crackin retorts comprising a main heating cham er, a plurality of sources of heat, a main duct communicating with each source of heat and a plurality of distributing ducts for each main duct connecting the same with the interior of said chamber, the ducts associated with different sources entering the chamber at the same level from opposite sides thereof.

6. A furnace for cracking retorts comprising a heating chamber, a retort in said 1 heating chamber, a source of heat, means for conveying heat from said source to different points of discharge within said heating chamber, said means arranged to compensate for difference in the degree of heat and draft pressure at said different points of discharge due to variation in distance from the source, and means for controlling the draft through a given group of said points of discharge.

7. A furnace for cracking retorts comprising a main heating chamber, a plurality of sources of heat, a main duct communicating with each source of heat and a plurality of distributing ducts for each main duct connecting the same with the interior of said chamber, the ducts associated with different sources entering the chamber at a common level from opposite sides thereof, and each duct having discharge openings progressively increasing in size from its point of entry into the chamber.

8. A furnace for cracking retorts comprising a main heating chamber, a plurality of sources of heat, a main duct communicating with each source of heat and a plurality of distributing ducts for each main duct connecting the same with the interior of said chamber, the ducts associated with different sources entering the chamber from opposite sides thereof, and each duct having discharge openings progressively increasing in size from its point of entry into the chamber, together with means to separate the inflow from the respective sources in the heating chamber after it leaves the ducts.

In testimony whereof I affix my signature.

FRANK E. WELLMAN. 

